Les espèces animales envahissante de l'Australie et du Canada
Summary
TLDRThe video script discusses the impact of invasive species in Australia and Canada, highlighting cultural icons like the wild horse which, despite being a threat to the ecosystem, is revered and even depicted on Australian currency. It also touches on the devastation caused by rabbits, the red fox's unintended predatory effects, and the Asian carp's disruption of aquatic ecosystems. The script then shifts to Canada, where species like the zebra mussel, emerald ash borer, and the Caucasian broomrape are causing significant ecological and infrastructural issues, emphasizing the urgent need for action against these invaders.
Takeaways
- 🐴 Australia has a problem with invasive species like wild horses that threaten the integrity and value of its unique ecosystems.
- 🐴 The wild horse is a cultural icon in Australia, even appearing on Australian currency, leading to controversy over drastic measures to reduce their numbers.
- 🐰 Rabbits are a significant invasive species in Australia, introduced for hunting pleasure, causing damage by over-grazing and slowing vegetation regeneration.
- 🦊 The red fox was introduced to Australia as a game animal for recreational hunting, but it has had a devastating effect, contributing to the extinction of several mammal species and endangering 62 more.
- 🇨🇦 Canada is also threatened by invasive species, including mussels, beetles, and fish, posing serious ecological challenges.
- 🐟 Asian carp were intentionally introduced to the United States in the 1960s to clean algae from aquaculture ponds, but they have since escaped and are wreaking havoc by consuming all plankton and the food of many aquatic species.
- 🐞 The emerald ash borer, a beetle from Asia, is suspected to have arrived in Canada hidden in ash wood, and its larvae burrow under the bark, disrupting the tree's ability to transport nutrients and leading to tree death.
- 🐚 The zebra mussel is another invasive species causing problems in Canada, feeding on available plankton and negatively affecting indigenous fish and other mollusks.
- 🌿 There are over 1440 invasive plant species in Canada, which, along with animals, pose a threat to native ecosystems.
- 🏆 The script mentions a 'ranking' of invasive species threatening Canada, highlighting the urgency and scale of the problem.
Q & A
What is the main concern regarding the wild horses in the Australian Alps?
-The main concern is that the wild horses threaten the integrity and value of the unique ecosystem in the Australian Alps.
Why are wild horses considered a cultural icon in Australia?
-Wild horses are a cultural icon in Australia because they even appear on Australian currency, making them a significant part of the nation's identity.
What is the controversy surrounding the measures to reduce the number of wild horses in Australia?
-The controversy lies in the fact that people are against drastic measures to reduce the number of wild horses due to their cultural significance.
Why were rabbits introduced to Australia and what problems have they caused?
-Rabbits were introduced for hunting pleasure, but they have caused significant damage by overgrazing vegetation, slowing down plant regeneration, and causing issues for farmers.
What was the initial purpose of introducing the red fox to Australia?
-The red fox was introduced as game for recreational hunting, but it has had a devastating effect on the ecosystem.
How has the red fox contributed to the endangerment of native species in Australia?
-The red fox, being a fierce predator, has contributed to the extinction of several mammal species and currently endangers 62 other species.
What invasive species are threatening Canada according to the transcript?
-Canada is threatened by invasive mussels, beetles, and fish, which are some of the most terrifying animals to have arrived there.
What is the impact of the Asian carp on the aquatic ecosystem in the United States and Canada?
-Asian carp, introduced to clean algae in aquaculture basins, have caused havoc by eating all the plankton and food of many aquatic species, as they have no natural predators.
What is the emerald ash borer and how does it affect trees?
-The emerald ash borer is a small, bright green beetle from Asia, about 1.5 cm long. Its larvae bore into the bark of ash trees, disrupting the flow of nutrients and water, leading to the tree's death.
What is the zebra mussel and why is it problematic for infrastructure and native species?
-The zebra mussel can cause significant problems for infrastructure as they feed on all available plankton, to the detriment of indigenous fish and other mollusks. They also allow aquatic plants to grow at greater depths, reducing water transparency.
How many invasive species were identified in Canada in 2002, and what was the estimated cost of their impact?
-In 2002, there were 1440 identified invasive species in Canada, with an estimated cost of 1.8 billion dollars due to their impact.
Outlines
🐎 Invasive Species in Australia
The first paragraph discusses the issue of invasive species in Australia, particularly the wild horse, which threatens the integrity and value of the unique ecosystem in the Australian Alps. The wild horse is a cultural icon and even appears on Australian currency, leading to controversy over drastic measures to reduce their numbers. The paragraph also mentions other invasive animals like rabbits and the red fox, which were introduced for hunting purposes but have had devastating effects on native species and vegetation.
🐟 Invasive Animals Threatening Canada
This paragraph highlights the threat of invasive species to Canada, including mussels, beetles, and fish, which are described as the 'scariest' animals. The speaker humorously suggests that these species are not impressive in appearance but pose a serious problem. The paragraph mentions the Caucasus berry bug and other invasive plants, with a total of 1440 exotic invasive species identified in 2002, including plants and animals. The speaker then introduces a 'palmarès' or ranking of the most feared invasive species in Canada.
Mindmap
Keywords
💡Invasive species
💡Wild horses
💡Rabbits
💡Red fox
💡Asian carp
💡Emerald ash borer
💡Zebra mussels
💡Ecosystem integrity
💡Cultural icon
💡Recreational hunting
💡Ecological damage
Highlights
Australia has a significant issue with invasive species, including feral horses in the Australian Alps that threaten the ecosystem's integrity and value.
Feral horses are culturally iconic in Australia, even appearing on Australian currency, leading to controversy over measures to reduce their population.
Invasive species in Australia, such as rabbits, were introduced for recreational hunting but have caused extensive damage to the environment.
The red fox was introduced to Australia as game for recreational hunting, but it has had a devastating effect, contributing to the extinction of several mammal species and endangering 62 others.
In Canada, there is a serious problem with invasive species such as zebra mussels, Asian carp, and the emerald ash borer.
Zebra mussels can cause significant problems for infrastructure by feeding on plankton, harming indigenous fish and other mollusks.
Asian carp were introduced to the United States in the 1960s to clean algae in aquaculture basins but have since escaped and are causing havoc by consuming all the plankton and food of many aquatic species.
The emerald ash borer, a small beetle from Asia, is suspected to have arrived in Canada via wooden ash tree cargo, causing significant damage to ash trees.
Invasive plants in Canada have been counted at 1440 exotic species, including the Caucasus thistle, which poses a threat to native plants.
The transcript discusses the need for awareness and action against invasive species to protect the environment and biodiversity.
The palmarès des animaux menace apam nasa, which ranks the most threatening invasive species in Canada, is mentioned as a resource for understanding the scale of the problem.
The transcript emphasizes the importance of identifying and addressing the impact of invasive species on native ecosystems.
Invasive species can have unforeseen consequences on the environment, such as the red fox's impact on Australian mammal species.
The introduction of species for recreational purposes has often led to unintended ecological disasters, as seen with the rabbits and red fox in Australia.
The transcript highlights the complexity of managing invasive species and the need for public understanding and support for conservation efforts.
The economic and environmental costs of invasive species are significant, with examples given of the damage caused to infrastructure and ecosystems.
The transcript calls for a coordinated approach to tackle invasive species, including public education and policy changes.
Transcripts
vous savez quel point j'ai peur des
animaux de l'australie l'australie aussi
son lot de zanimos envahisseurs on
retrouve actuellement dans les alpes
australienne le cheval sauvage qui
menace l'intégrité et la valeur de cet
écosystème unique
il s'agit de sujets controversés parce
que le cheval sauvage est une icône
culturelle et apparaît même sur la
monnaie australienne
donc les gens sont contre les mesures
drastiques pour qu'il y en ait moins
c'est vraiment le monde à l'envers en
australie c'est des animaux en apparence
innocentes qui font des ravages nom
d'animal envahissant qui fait des
ravages en australie qui a été introduit
pour le plaisir des chasseurs
c'est le lapin oui le la paix commun qui
broutent la verdure ralenti la
régénération végétales et ce à cause des
problèmes aux cultivateurs à renier le
renard roux a été introduit en australie
comme gibier pour la chasse récréatif
mais un effet dévastateur parce que
c'est un prédateur féroce de contribuer
à l'extinction de plusieurs espèces de
mammifères et met actuellement en danger
62 autres espèces aux attentes a régné
au moloch
transition entre deux segments
[Musique]
présentement il ya des animaux qui
envahissent le canada comme lui qu'un
vas y mon appartement attention
canadiennes et canadiens
notre pays est menacé allons sauver le
canada
nous sommes menacés par des moules des
coléoptères et des poissons c'est pour
les animaux les plus terrifiants qui
débarque le ça a pas l'air
impressionnant mais on a un sérieux
problème
métaphore franchisés donc j'aime les
problèmes là on a la berce du caucase en
hall fred midi plein d'autres plantes
envahissantes qui nous attaque
c'est un vin blanc je le pousse vers les
plantes ne font pas peur aux plantes et
plantes ont compté 1440 deux espèces
exotiques envahissantes en 2002 incluant
les plantes et un clame 1,8 selon eux à
moi ils m'ont inspiré pour vous préparer
le palmarès des animaux menace apam nasa
qui envahissent le canada le palmarès
des connaissances avoir peur de tout
bloquer numéro 3 la carpe asiatique
les carpes asiatiques ont été
introduites volontairement aux états
unis dans les années 60 pour nettoyer
les algues dans les bassins
d'aquaculture à cause des inondations
c'est énorme carte se sont échappés dans
la nature et maintenant sans prédateur
naturel elles font des ravages aux états
unis et jusqu'au canada en mangeant tout
le plancton et la nourriture de
nombreuses espèces aquatiques l écart je
vais vous avoir
vous transformerez pas mon pays un kart
nador cartney de ceylan les abdos de
l'agrile du frêne
l'agrile du frêne est un petit
coléoptère d'un très beau vert émeraude
originaire d'asie mesurant environ 1 5
cm on soupçonne qu'il était trop du
chez-nous dans un bateau cachés dans les
marchandises en bois de frêne ses larves
creuse des sillons sous les causes des
frais la scène va donc la difficulté à
circuler jusqu aux feuilles ce qui fait
mourir l'arbre j'en ai un je l'étais
d'écraser moins qu'on va et pensent ils
vraiment tous les vols
numéro un la moule zébrée la moule
zébrée peut créer de gros problèmes aux
infrastructures elles se nourrissent de
tout le plancton disponibles au
détriment des poissons et autres
mollusques indigènes et comme elle
permet aux plantes aquatiques de pousser
à de plus grandes profondeurs salle eu
pour effet d'augmenter la transparence
de l'eau en plus la moule zébrée ait
d'autres espèces invasives à se
multiplier
poc avec le psy sont ligués ensemble
nous avons besoin de renforts
moi quelque chose lui mouche forme
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